Automatic injector.



PATENTED APR. 21

I L. BUEHLER. AUTOMATIC INJECTOR.

APPLICATION FILED JULY 17, mos RENEWED JULY v1 1, 1907. 7

ITNESSES.

UNITED STATES PATENT OFFICE.

LOUIS BUEHLER, oF DETROIT, MICHIGAN.

AUTOMATIC INJECTOR.

To all whom it may cncem:

Be it known that I,LoU1s zen of the United States of Americm r'esiding at Detroit, in the county of Wayne and State "of Michigan, have invented certain new and useful Impro ements in Automatic Injectors,

of which the following is a specification, refer- ,ence beingjhad' thereinto, the accompanying drawings.

My invention'relates to that class of autoinatic injectors which are self-starting and re-startin'g. The distinguishing feature of this class is that in addition to' the ordinary overflow check valve into the atmosphere they are provided with an interior check valvejada'pted to control the overflow from the mouth of the combining tube.

My' invention consists inthe vnovelconstruction and arrangement of this valve whereby it performs a new, and'novel function which im roves the starting and re-starting quality "o the injector, and also adds 'tothe lifting power thereof, all as more fully here inafter described and shownin the accornpanying drawings, in which;

Figure- 1,1 is a vertical central section through an' injector of the vertical type em- 'bod ing my invention; Fig. 2, a section 011 the in'elel of Fig.3, throughan-injector of thehoriz onta'l type embodying myfinvention; F'g. 13, a'section on the l1ne 2-2 of Fig. 2, looking to the right,

A is the casin which'is' substantially of tubular form me using the jets and provided with a branch B'for the overflow. f O is the inlet .port for the water.

"Dis the steain'jet, E is the lifting tube, F a

partition in which the lifting tube is'secured.

G is the combining tube and H the delivery tube, the two latter being preferably madein one piece andsecured in thecasing b means of. an annular flange J and screw t eaded nip le J or in-any well 'known manner."

j be combining tube is refe'i'ably provided near its mouthwith spil holes afandabout half way of its length with"like spill, holes, b

I and at about the junction between the 'cornbining and delivery cones the usualfoverflow openings 0 areformed. I

ber I which communicates into the atmosare separated b a diaphragm O. The assage L is 'contro led by a check valve P w ich has a hollow stem sliding on a pin Q formed Specification ofLetters Patent. Application ni e Ju1y;17,"1903, scin Ne. 165,902. Renewed Jul ii, 1907, Serial m ans;

B EnnnR, acitii The combining and delivery conescornmu nicate with the surrounding overflow cham- Patented' 1; I

passes through the cap S for "limitingz'the opening movement of the overflowyalve or screwing the same shut. Thedischargegend fbining tube are the usual distance rapartl'ito which communicates withfthe overflow chem ber-under control of avalve T. This valve the combining tube whichslidingly engages ders d formed thereon adapted to form 'a' tilt of the parts is such that the mouthi' 'of the combining cone and the openings a are within the cup. I the shoulders d being correspondingly roundthereby insuring a perfect seating of the cup at all times. I,

In practice the injector being connedted in is not working. If the injector is put ln opthrough the overflow K and the openings a into the atmosphere by lifting the valve The free flowof steam'through the lifting tube'will therefore create a suction and lift the-water into the chamber W1, and thence freely escape throu h the overflow opening this chamber is above the overflow K the latsealed'. A progressive sealing of the different overflow openings will therefore take place onthe' lower end of a thumb form an overflow opening K'between them is cup shaped and of a diameter larger thanfi upon a cylindrical portion of the liftin tube and is adapted to rest upon lugs V whic prevent it from making any extended surface contact which might cause the valve to stick and become fast in position. r In order to, ers mit this valve T to rock or tilt to accommo ate itself to its seat or any inequalities-or imperfections in manufacturethe corners vwhereit slides u on the lifting tubermay be rounded? off as s own. U is a disk 'loosely' sleeved uponthe combining tube between the shoul-o ing seat for the cupT to rest against andit will further be seen that the relative position" a The inner edge of the idiskflUand into the lifting tube. At first the water will I 105 K into the cup T an into the overflow ch'a'm-f ber I. However as the overflow outlet from ter will in consequence become uicklyi along the combining tube until the overflow ed to permit the disk to have a liinited'tilting 5- movement as indicated byqthe d'otted lines the usual manner to the steam and-wafter supply iand to the deliverynpip'e intO th'e holler, the check valve '1- iskept open -and the check valve P is closed'when' the injector eration by turning on the steain Z the latter will first drive'out the air and escape 'i'reely VI), and 0 into the overflow chamberand thence Yang of the-"up prevents the water in the overflow chamber from circulating, which after .it becomes hot would defeat the proper startwater and quickly builds up the stream.

, formed. therein, of lifting, and combining entirely ceases, as soon as the stream is formed and forces its way into the boiler, which causes" the closing of the valve P. Before this valve however closes the suction created at the mouth of the combining tube will-cause the cup T to be lifted and become seated against the flange U and remain seated as long asthe injector is working. This seating ofthe injector.

. heam le provisions made for afree overli in. startin can take place nearly the'whole length of t e combining tube, in

sures a prompt lift and the gradual sealing of the overflow openings which while it confines-the steam holds it in contactwith the The sealing of the overflow valve T by the water. in the overflow is a great advantage, as in all constructions in which this is not the case, the steam escaping' at the overflow K always causes a certain reaction which causes this valve'to flutter from and towards its seat, which interferes with the free esca e of the steam in starting and this action ex ains why injectors. of this description li t the Water at vmost, only to a height of about twenty feet,,while I obtain a lift of several feet more. Furthermore in my construction the.,va'lve being below the top of the overflow chamber and having necessarily a loose play on the lifting tube it allows constantly a little water to be sucked in when the injectoris in operation. Thus if any water accumulates in, the, overflowv chamber which is especially the case when an injector is sup ied with hot feed water or when it is wor ing' with steam near the limits of pressures for which it is adapted, it will constantly absorb such water, .thus causing the injector to keep in operation when otherwise it would cease working. 4

Having thus fully described my invention, what I claim is v 1. In an automatic injector, the combination with the casing and overflow chamber tubes arranged in Jalinement with each other in said chamber and forming an overflow opening between the same, a cup valve sliding on the lift-in 1 tube and extending beyond tube, adisk'doose on thecombining tube l adapted to for m a seat for the cup valve and an overflow outlet'froni the overflow cham 1 her arranged at a point above the cup valve.

2. In an automatic in'ector the combination with the casin an overflow chamber formed therein, of t e lifting tube entering one side of the overflow chamber and the adapter to f 'drm a seat for said cup va ve and 'a valve controlled overflow outlet from the overflow chamber located above the bottom of said chamber and adapted to form a water seal in said chamber for the overflow from the lifting and combinin tubes.

In an automatic in ector, the combination with the casing and overflow chamber formed therein, of lifting and combining tubes arranged in alinement with each other in said chamber and forming an overflow opening between the same, a cup valve sliding on the liftin tube and extending beyond and inclosing the mouth of the combining tube, a disk loose on the combinin tube adapted to form a tilting seat for t e cup valve and an overflow outlet from the overflow chamber at a point above the mouth of the combining tube.

4. In an automatic injector, the combination with the casing and overflow chamber formed therein, of lifting and combining tubes in said chamber and forming an overflow opening between them, an automatic overflow valve having a tiltin seat controllin said overflow o ening ans a valve contro led overflow out et from the chamber at a point above the mouth of the combining tu )e.

5. In an-automatic in'ector, the combination with thecasing an overflow chamber formed'therein of lifting and combining tubes projecting into said chamber from opposite sides and forming an overflow opening between them, ,a cup valve slidin on the lifting tube and inclosin the mouth of the combining tube, a disk oose on the combining tube adapted to form a tilting seat for the cup valve and a"'valve controlled overflow outlet from the overflow chamber at a po nt above the cup valve.

In testimony whereof I aflix my signature in presence of two witnesses.

LOUIS BUEHLER. Witnesses:

OTTO F. BARTIIEL, 'lnoMAs G. LONGS'IAFF. 

